"Nothing sounds quite like an ice cream van, and this post on EM411 left me wondering how they work. This is what I found: 'Early models consisted of a hand tuned Swiss musical movement (like a music box) fitted with a magnetic pick up and the amplifiers used radio-type valves. In 1958 reliable transistors came on to the market and efficient amplifiers were built to work directly of the vehicle's battery...'"
February, 19, 2007 | By Bill Keaggy
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